There will be no Barr body in female suffereing from :-

Options

A. Turner syndrome
B. Klinfelter syndrome
C. Down syndome
D. Haemophilia

Answer

To solve the question "There will be no Barr body in female suffering from:", we need to understand the concept of Barr bodies and the conditions that affect their presence.

### Step-by-Step Solution:

1. **Understanding Barr Bodies**:
- Barr bodies are inactivated X chromosomes found in females. In typical females, who have two X chromosomes, one X chromosome is active while the other is inactivated and forms a Barr body.

2. **Counting Barr Bodies**:
- The number of Barr bodies in a female is calculated as the total number of X chromosomes minus one. Therefore, if a female has two X chromosomes, she will have one Barr body (2 - 1 = 1).

3. **Identifying Turner Syndrome**:
- Turner syndrome is a chromosomal disorder where a female has only one X chromosome (45, X). Since there is only one X chromosome, there is no second X chromosome to inactivate, which means there will be no Barr body present.

4. **Analyzing Other Conditions**:
- **Klinefelter Syndrome**: This condition affects males who have an extra X chromosome (47, XXY). Males with Klinefelter syndrome would have one Barr body (2 X chromosomes - 1 = 1).
- **Down Syndrome**: This is caused by an extra chromosome 21 and does not directly affect the number of X chromosomes, so females with Down syndrome would still have Barr bodies.
- **Hemophilia**: This is a genetic disorder related to the X chromosome but does not affect the number of X chromosomes in females, so they would still have Barr bodies.

5. **Conclusion**:
- Therefore, the only condition where there would be no Barr body in females is Turner syndrome.

### Final Answer:
The correct answer is **Turner syndrome**.

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